Exam AWS Certified Solutions Architect - Professional topic 1 question 954 discussion

B - enables connection pooling for RDS D - create the database connection outside of the handler to allow connections to be re-used by subsequent function invocations. https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-lambda-tutorial.html

Correct BD

B: https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtime-environment.html#:~:text=Objects declared outside of the function's handler method remain initialized D: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/rds-proxy.html#:~:text=RDS%20Proxy%20establishes%20a%20database%20connection%20pool%20and%20reuses%20connections%20in%20this%20pool.%20This%20approach%20avoids%20the%20memory%20and%20CPU%20overhead%20of%20opening%20a%20new%20database%20connection%20each%20time

BC makes sense

B and D for me

B and D are the ones.

I go witch B and D. for B: Connect to RDS outside of Lambda handler method to improve performance https://awstut.com/en/2022/04/30/connect-to-rds-outside-of-lambda-handler-method-to-improve-performance-en/ for D: Using RDS Proxy, you can handle unpredictable surges in database traffic. Otherwise, these surges might cause issues due to oversubscribing connections or creating new connections at a fast rate. RDS Proxy establishes a database connection pool and reuses connections in this pool. This approach avoids the memory and CPU overhead of opening a new database connection each time. To protect the database against oversubscription, you can control the number of database connections that are created. https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/rds-proxy.html